Door operating mechanism



Feb. 5, 1935. A, BRODSKY 1,990,166 I v DOOR OPERATING MECHANISM Filed Oct. 12, 1932 4 Sheets-Sheet 3 M INVENTOR- Y flag'arz Bra day @BM M A onusvs A. BRODSKY 1,990,166

DOOR OPERATING MECHANISM .Filed Oct. 12, 1932 4 Sheets-Sheet 4 INVENTOR- Aarmz Brodwly Mxw M A ORNEYS Patented Feb. 5, 1935 V Application The present invention relates broadly to door operating mechanisms andimore especially to an operating mechanism fora sliding door'of the type commonly used in penal-institutions.

The present invention comprises automatic mechanisms whereby a plurality of doors, as for example, cell doors may beunlocked, opened, and. closed by remote control apparatus.

The invention also contemplates manually operated mechanisms whereby a plurality of cell doors may be simultaneously unlocked and then individually manually opened and closed should the automatic mechanism become disabled.

A furtherfeature of the invention contemplates automaticmechanism as specified for unlocking, opening, and closing a groupof doors and provision for manually unlocking, opening, and 010sing individual doors ofthe group should the,

automatic mechanism become disabled.

More specifically, the present invention coma prises electrically operated mechanism for ma locking and opening and closingthe doors with the mechanisms constructed in such manner that the electric motors may be started under a' very light load which is sufiicient to unlock the doors and then after the motors-have been running at full speed,'the heavyload of opening the doors is applied to the motor. On'the 'closing'move ment of the 'door, the 'motors'operate'at vfull speed fora period of time with substantially no load and then the load comprising the inertia of the door is picked up and carried along until the door is closed by the operation of the motor. These features are particularly desirable since it enables the utilizationof small motors to 'do the work which would ordinarilyrequire large motors,

providing the full operating load had to be carried as 'soon as the motors started."

Other features of the invention will be apparent to those skilled in the. art and will in-partbe pointed out hereinafter in the specification-by ref 4 erence to the drawings whichcomprises a disclosure of the preferred form of the invention.

It is realized that the invention may be carried out in structures other than those specifically disclosed herewith, and, therefore, the present disclosure is to be understood" as illustrative and not in the limiting sense.

Fig. 1 illustrates more or less diagrammatically an elevation of the preferred form of the invention as applied to a single door.

Fig. 2 illustrates a section of the device shown in Fig. 1 taken on line 2-2 of Fig. 1. i

Fig. 3 is a'detail front elevation of a portion of the operating mechanism shown in Fig. 2. t Fig. 4 n. detail elevational view on-line 4 4 of Fig. 1, showing the parts-in section, of the manually operable mechanism for releasing the locks on the cell doors. 1 Fig.5 isa plan view of a portion-of the mecha- October 12, 1932, Serial No. 637,418 12 Claims. (01. 189-1) j1'ff and 10 by rneans of anti-friction wheel's ll-and- '11 secured and is, provided nism' illustrated. in Fig. 4on a section taken or;

Fig; 6 is a detail'vie'w illustrating-the operat' g locking bar for the cell ddor; d a Figi 'l illustratesa detail of'the'locking-dev for the-"cabinets enclosing the mechanism? Fig18 illustrats aplurality of. cell'doors s ow} ing-manually operated levers for manuallylocking the cell doors' and; disabling the auto matic'opening and closing mechanism aiid also the manually operating 'device'for unlockin the cabinet doorso'f the operating mechanism. Y I Referringtothe drawings and more especially to j Fig. 1, a'drive screw'shaitl is mounted format on in the frame members 2 andl'abovethecell-door 5 "and carries a ;large gear 6- whichengages a pin ion '7 on the drivej"shaft of an-.;el'ectric motor 8. The cell door 5 is"suspended from tra'ckways 9 to the cell door, so that the 'door h =a sliding movement in opening and closing. ""gThedrive screwshaft l carries a sore -t d block 12 which' is prevented from rotating fa square shaftliftha't' extendsthrough "aamter lock member 15 which has trunnionsmountedfor rotation-the bearings 16 mnnedinme iawer par-t offthe screw" threaded block 12} Freferably; in order to facilitate assembly, the screwthieaded block 12 is made initwo pieces which are --scu' ed together'by bolts 1'1. [The interlock member 15, is" provided with a laterally XtBnding arInZ-T adapted to normally rest on an interlock block 19 securedtothe topbf the cell 'door block 19 hasa slideway 20 in the'upper end thereof, the length of which slidewayds' long'er thanthewidth of the arm-18, so that thearm 18 d 3 has an idle movement before engaging theends' of the slideway 20 The topof the screw threaded block 12 is provided with a short cam 21' will If engages awedgecam 22 on allever 24l which pivoted 'to' the mechanism frame m'e'm b s an er 'i iss n 'cts f a T s ie ,withithe locking bar ,127 ,for'the'icell door rms locking bar 27, is mounted in 'guideways'281(Figjfi), i terv i'wit o n e529. f receive thealocking heads 30 }integral: witnthe front edge of thelcell door 5 so 'that henthe cell doors are closed, the weight; of he locking bar drops the barbetween-thenose 31 on thejlock e ing head 30 to lock the cell door .closed.-: ;This mechanism is mounted in the framework of the door in suchmanner as; to be inaccessible; from the inside of the cell...=;a.' r .1 1' 1 at; In the operationof- 'single unit withtheparts in position shown' inFii 1'} the 'op erat'or throws a" switch sz (Fig; 8 "which energizesthe ei'eetne motor' 8'flto' 'tu'rn1the drive screw] shaft jsuc h direction as to move the screw block 12 toward the right of Fig.1. The first operation of this 35 has tee trun opened, th motor-stalls without movement isto slide the short cam 21 beneath the drive screw shaft. 1' until the cycle .is 00m? tinuous cycle.

the wedgefcam 22. At approximately the time when the tips of thesetwo cams are in contact, the arm 18'of the interlockengages the right end of the interlock block 19 and the full load now comes on the motorf8. In; other words, the doonbe ins' toslide toward the right. The contact of the high points of the cams 21 and 22 has lifted the locking bar 27 in such manner thatthe bar clears the nose 3 1 of thelocking heads 30z-- l4sftliemotor continues to run and the door starts to'open, the short cam'21 gradually slides heneath the long face of the wedge cam'22; therebyslosvlydroppingthe locking'bar 27. In the meantime, the

nose 31 of the locking head 30' has pas'sed sufll eiently beyond thesldes of the opening 29 'inathe locking bar so that the door is free to move in a-,sliding-motion which 'carriesthe door to open position; From the foregoing, it will appear that th opening m en iot'the door is one consizine of the mo or 8 which continuously rota es nletedt lnthe initial portionof this single cycle, screwthreaded'block .1 2 moves to slide the shortcam 21 beneath; wedge shape camy22yto raise theFlever, 24 andthus -lift1the locklnasbli 27 to unlock thecell doorsS. Asthiscycle of movement continues, the arm18 contacts with the interlock block 19 and thevopeningmovement ofthe door beginsandcontinues until thedoor is finally completely open. The, electric, motors 8 are so constructed thatifgthe operator does not open the switch 32rpromptly when the cell door serious damage. In other w rd ,athemotor 5 I constructed to carry very severe overload. The

inc movement of the door. As door continues motoris also reversible so that 'by reversing the poeltion'of the switch 32, the electriealcurreut is reversed and the] motor is caused to rotate v inthe f to close, the cam 21 rides ,upon the longwedge W43 and thereby lifts bar 27 to raisethe same above the nose 31 newsman;

3) until the. flatpart 34 cfpthe aose allisrbeneath me locking bar. As the locks T in: har iisirelea sed bvthecam :21 sliding from 99 ,nmnypm i a hei oclslns bar 21 d ops int orposilntheseries jare q 7 's are closed themotor' 8 stops because to fi-function. Thev beneat'lrthecain bar 27 rests on the flat part s4'prth ri js'e3'1 while the. debris. makin thev closing; movement; When the, door is tl be n e th e 11mlth eel iid sils e curelydock'ed closed." Here, again, the switch 32 ispermitted to stay closed until all of the doors securely locked and closed'l" When thescre'w-=block"12 cann'ot' b moved "further due to the door being closed. "However; as above ex plalnedthe motor lsadesigned togtake this overload without danger of burning out. a Rrovisionis made tomanually-release either a series of doors or a slngle'jidoor in case the au o matic electrically driven {mechanism should fail manual release comprises; a square bar 35 slidably movable across the entire series ofjcell asilfluatratpdin a, This I 'l'his'jcycle begins with thef-ener shaft is connected withja hand lever 36 havinga latch 37 normally locked in a notch in the segment 38. By releasing the latch 37 in the notch .in the segment and pulling the hand lever 36 outwardly, ,the' square bar 35 1s lmoved lengthwise. 'I'hisihar carries an actuator 39 for each'cell .door equipment. This actuator, is connected by a slidinounted on the'frame member 2 and connected at its-other arm with a thrust' link 42. "The thrust link isprovided with a long slot 44in which is mounted a pin 45 on an arm 46 mounted on the square'shaft 14. Another arm 47 also mounted on the shaft 14 extendslaterallytherefrom and is connected by an adjustable link 48 with acam arm 49 pivotedaths mechanism frame member 26, This cam arm 4,9'extenc1s beneathythe lever in; pin-slot 40 with one arm of a bell crank 41 24 which is connected Witha locklng' bar 27. v i

It will be observed that the'endwise movement ofitho Square; bar'35in the directionof the arrow- 5, willoperate to rotate the square shaft 14 in he direction of th arr w in .Fi 4.; Thi

the locking bar 27 'to; unloekthe celldoors 5,. .flius movement of the square shaft 14 also turns theinterlock member 15 units trunnions and lifts the arm 18 above the slideway 20 inlthe interlock block 9. The cell door isnow both unlocked and vneed from the automatic operatin mechanism so that the cell docr'may be-opened par s pera eso r l eonn rerow" of cell doors, as may benecessary in casesof emergency. M 'I,hemechanism for automatica ly op ratin cash celldooris all mounted within-a cabinet as illus ra ed ioFis, This cabinet .islproviiied rotation of the square shaft 14 through the link 48, 11 the camarm49' raises the lever 24., and,

manually. .Thissquare bar 35 and; connected 7,

on thefront face with a cabinet door 50 which locked in pla e y thelock-r d 51 extendin past all of the ,11 doors ofa; tier of. cells-.,

9 06 6 carries lat h s 2 as lu tra ed in Fla w ich ens e 'h adsw a shown in Fig. 2. The upper edges of the cabinet doors are pr ided-W th r ve he d 5 wh ch flit in" bayonet openings 55 in the frame nriember 2 (Figs. 1 and 2.) sothat when therivet head epo e hroueh th o nd porti n oithe opening 5.5. the door 50 drops ,downw'ardand the upp p rt of; th (horn ecur d t thefmme 'Ihelower part he door .150 ip o idedwith alug 56 that drops over 'theqframe me'mber4. t w b se d hetbvo at ns he hood lever 57 to release the latch- 58 thereof from the I notch in the segment .59 andthen sliding the lock rod 51, the lock 52 releases the. rivet head 53 so that'th abinet d r 50 may b r moved,-

When this is do e, th ve ge m 6 avbe reached through the opening left by removal of the cabinetdoor 50. This lever-may, be provided'with a t h l in wh ch the push has 62 (illustratedfindotted lines Fig.4), maybe inserted, whereby an upward thrustcn this bar 62 rotates the square shaft l4. flhe thrust pin 4501.: the arm-46 tr v ls, idly in theyl rie s o 44and the arm 47'through the adjustable link 48 operates the carn armx49 to lift thelever- 24 and-"the locking bar 2 7, .thereby unlocking an individual cell. The rotationjof the-shaft 14 as has. pr i us y b en e plain d aises he, ateral arm laafrom the'slideway 20 so" that the door is releasedfor 'manual opening \operm'ion.

"I is to beu der od tnattheswi ch 2 and the operating levers ,36 and 57 arelocated withv in alocked room which is not available tothe otth cel s. It isslso tohemndsrstnod l that all of the operating mechanism for the cell doors is securely mounted in cabinets above the cell door which are thoroughly protected against access from anyone within the cell.

The present means whereby largegroups of cells'may be controlled by remote control. Also,'1 large groups of cells may be controlled by manual remote control, and in case of necessity individual cells may be rendered manually. individually operative.

Having described my inventiornl claim:

1. A door operating mechanism comprising in combination a door, locking means for said door, a main control shaft, a remote controlled motor to operate said main control shaft, means operated by the'initial portion of onecycle movement of said shaft to unlock said locking means, and means operated by the continued portion of the same cycle movement of said shaft toopen said door.

2. A door operating mechanism comprising in combination a door, locking means for said door, a main control shaft, a remote controlled motor to operate said main control shaft continuously for onecycle of operations, means operated on the initial movement of said shaft to unlock said locking means, means operated on the continued movement of said shaft to open said door, and manually operated means to release said door from said control shaft and to unlock said door.

3. A door operating mechanism comprising in combination a door, alocking bar operated by gravity to lock saiddoor when closed, a main control shaft, an electric motor to operate said main control shaft, means operated by said shaft to raise said locking bar against gravity during the initial movement of said shaft, and a connection between said shaft andsaid door to; open said door and to permit an idle movement between the shaft and door during the raising of the locking bar to unlock the door.

4. A door operating mechanism comprising in combination a door, alocking bar operated by gravity to lock said door when closed, a main screw threaded control shaft, an electric motor to operate said main control shaft, a nut mount ed to travel'on said shaft, a cam on said nut, a lever connected to said locking bar and operated by said cam to raise said locking bar against gravity during the initial movement of said shaft, and a connection between said shaft and said door to open said door and to permit an idle movement between the shaft and door during the raising of the locking bar to unlock the door.

5. A door operating mechanism comprising in combination a door, a main control screw shaft, an electric motor to rotate said control screw shaft, a threaded member mounted on said screw shaft and adapted to move on said shaft when the same is rotated, means to prevent rotation of said threaded member, an interlock block carried by said door, interlock means carried by said threaded member and adapted to engage said interlock block on said door, and means to disengage said interlock means from said interlock block.

6. A door operating mechanism comprising in combination a door, a main control screw shaft, an electric motor to rotate said control screw shaft, a threaded member mounted on said screw shaft and adapted to move on said shaft when the same is rotated, a cam operated by said member, a release shaft on which said member slides to prevent rotation of said member, an interlock block carried by said door, interlock means car invention provides automatic,

" means from said interlock'block. V r

'I. A door operating mechanism comprising a door, a screw threaded main shaft, an electric v,

engage said interlock block ,onisaid door, said interlock means being slidableon said release shaft and rotatable therewith, and means to rotate interlock said release shaft to disengage said" motor to rotate said shaft, a threaded nut carried by said shaft and adapted to travel thereon when .said shaft is rotated, a square shaft, an

ried by said threadedmemberand adapted to interlock arm mounted in bearings carried by said threaded nut and slidable on said square shaft, aninterlock block on said door and adapted to be engaged by said interlock arm, and

means to rotate said square shaft to disengage said interlock arm from said interlock block. I

8. A door operating mechanism comprising a door, a lock for said door, a screw threaded main shaft, an electric motor to rotate said shaft, a

threaded nut'carried by said shaft and adapted to travel thereon when said shaft is rotated, a'

square shaft, an interlock arm mounted in bearings carried by said threaded nut and slidable on said square shaft, an interlock block on said door and adapted to be engaged by said interlock arm, an idlemovement being provided between said arm and said bloclqmeans to unlock said lock during the initial idle movement between said arm and said block, and means to rotate said square shaft to disengage said interlock arm from said interlock block. Y

9. A door operating mechanism comprising a door, a main control shaft, a motor to operate said shaft, a locking bar to'lock said door when closed, operating means connecting said shaft and said door whereby the operation of, said shaft opens and closes said door, unlocking means actuated by said operating means to operate said.

locking bar to, unlock said door, and means to disable the effective operation of said operating means and said locking bar.

10. In a mechanism of the class described,

lease said doors from said power means-whereby 5 said doors may be manually opened and closed.

11. A-mechanism of the class described comprising a group of doors, individual locking means for each door, individual power means for each door actuated from a'single' source of power whereby the whole group of doors may be simultaneously unlocked, opened and closed, and means independent of said power means to unlock all of the doors of said group and render all the individual power means ineffective to open and close said doors.

, 12. A mechanism of the class described comprising a group of doors, individual locking means for each door, individual power means for each individual power means ineffective to open and close said doors, acabinet over each door enclosing the operating mechanism therefore, a locked cabinet door for each cabinet, and means to sigroup of doors.

AARON BRODSKY.

'multaneously unlock all the cabinet doors for a I 

